The title “Bonanza” is a term used by miners in regard to a large vein or deposit of silver ore, from Spanish bonanza (prosperity) and commonly refers to the 1859 revelation of the Comstock Lode of rich silver ore mines under the town of Virginia City, not far from the fictional Ponderosa Ranch that the Cartwright family operated. The show’s theme song, also titled “Bonanza”, became a hit song. Only instrumental renditions, absent Ray Evans’ lyrics, were used during the series’s long run.
In 2002, Bonanza was ranked No. 43 on TV Guide’s 50 Greatest TV Shows of All Time, and in 2013 TV Guide included it in its list of The 60 Greatest Dramas of All Time. The time period for the television series is roughly between 1861 (Season 1) and 1867 (Season 13) during and shortly after the American Civil War.
During the summer of 1972, NBC aired reruns of episodes from the 1967–1970 period in prime time on Tuesday evening under the title Ponderosa.
NBC / Public domain